Editing Positional tracking

'''Position and rotation tracking''' is the tracking of something's [[position and rotation]] in space, such as a headset or a controller.

It is also known as '''6DOF tracking''', for the 6 degrees of freedom (DOF): horizontal, vertical, depthwise, pitch, roll, and yaw. It is used in an [[absolute positioning system]]. It can be done using a number of different hardware technologies, such as [[electromagnetic tracking]] or [[camera-based tracking]].

Methods of camera-based tracking include methods using [[SLAM]] or [[VIO]].

Position can be represented in a computer system using a 3D vector. Rotation can be represented using a [[quaternion]].

PnO tracking is related to rotation tracking, which uses [[3DOF]] of space.
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== Methods ==
* [[Markerless inside-out tracking]], which is [[camera-based tracking]] (SLAM/VIO)- This is used on headsets such as Meta Quest headsets and the [[Project North Star]]. An open source method is [[Basalt]]. It can use visible light or infrared light, which can be artificially emitted.
* [[Marker-based tracking]] - Camera based tracking that uses markers in the environment, which is simpler to implement.
* [[Electromagnetic tracking]].<ref name=3duibook/> Electromagnetic tracking requires an external source. It gets jittery when there is metal around, like a metal laptop computer. Magnetic tracking is typically wired, but it does not have to be.
* [[UWB tracking]]
* [[Mechanical tracking]]<ref name=3duibook/>
* [[Acoustic tracking]]<ref name=3duibook>[[3D User Interfaces: Theory and Practice]], 1st edition, page 97</ref>
* Visible light-based tracking
* Infra-red based tracking

==Magnetic tracking==
240Hz is generally sufficient if using magnetic tracking with no filtering.

== History ==
3D tracking has been used for motion capture for 3D animated movies.

The 3DOF regime of cheap tracking was embraced by [[Oculus VR]] with the original [[Oculus Rift]]. The CV1 of the Oculus Rift used (and the DK2) [[constellation tracking]], which is a complex method of 6DOF tracking added on to a robust 3DOF system.

==References==
{{Reflist}}

[[Category:3D tracking]]